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54-Object. Defineproperty method

2022-07-20 08:41:00 【longfei815】

54-Object.defineProperty Method

// obj.name = 'Vue'
// It can be used to set properties for objects
// Object.defineProperty( Object name to add attribute , Property name , Some property settings )

<!DOCTYPE html>
<html lang="en">
    <head>
        <title>54-Object.defineProperty Method </title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <script>
            let obj = {
                age:7
            }
            // obj.name = 'Vue'
            //  It can be used to set properties for objects 
            // Object.defineProperty( Object name to add attribute , Property name , Some property settings )
            Object.defineProperty(obj,'name',{
                value:'vue',
                writable:true, //  Set up obj Of name Properties can be modified , If not set , The default is false, Cannot be modified .
                configurable:true, //  Set up obj Of name Properties can be deleted , If not set , The default is false, Can't be deleted .
                enumerable:true, //  Set up obj Of name Properties can be traversed , The default value is false Cannot be traversed .
            });
            console.log(obj);
            obj.name = 'Vue3';
            console.log(obj);
            
            // delete obj.name //  Delete object obj Of name attribute .
            // console.log(obj);

            for(key in obj){
                console.log(key);
            }
        </script>
    </head>
    <body>
    
    </body>
</html>

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